Key chain



FIG. 1 is a left side view of a key chain showing my new design.

FIG. 2 is a right side view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a back view thereof.

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for the key chain, as shown and described. 